pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-26801-BENNET.ps) >>/Users/jc/w/tmp/Tune-26801-get.log 2>&1" returned status 256
http://www.cpartington.plus.com/Links/Bennet/BENNET(12-4-16).ABC

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-26801-BENNET.abc 602 ABC music file with the extracted tune(s)
Tune-26801-BENNET.ps 37876 PostScript
Tune-26801-BENNET.txt 602 Plain-text file with the extracted tune(s)
Tune-26801-get.log 6037 Log file, useful mostly for debugging
These files should be available for 24 hours.